Attachment for hammers



Dec. 3, 1929.

c. D. CUMMINGS 1,737,646

ATTACHMENT FOR HAMMERS Fiied April 16, 1928 Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE CHARLES I). CUMMINGS, OF TULLY, NEW YORK, ASSIGNOR OF TWENTY-FIVE PER CENT TO LEO E. FULLER, OF SYRACUSE, NEW YORK, AND FORTY-NINE PER CENT TO ALEXANDER F. FULLER AND CHARLES A. ALLEN, BOTH OF PORTSMOUTH, NEW

HAMPSHIRE ATTACHMENT FOR HAMMERS Application filed April 16,

This invention relates to a new and improved attachment for hammers.

In using hammers, particularly of the type called machinist hammers, it is frequently necessary that the weight of the hammer be varied in using it for different purposes. This is usually accomplished by having hammers of this type of different sizes which necessitates the expense of the hammers themselves and the necessity of carrying them from job to job.

It is also desirable in using hammers of this description to have striking faces of different degrees of hardness because hammers of this type are frequently used to drive out bolts by striking them on the threaded end, and if the striking surface of the hammer is of a ma terial softer than the material-of which the bolt is made there will be less liability of upsetting the threads in the end of the bolts which would render it unfit for further use.

The main object of my invention is to provide a detachable device which may be used with a machinist hammer to add weight to the head thereof when desire-d.

Another object is to provide a detachable device of the character just described which will itself become, if desired, a striking surface for the hammer which will be softer than the striking surface or pawl of the hammer itself.

Another object is to provide a means for retaining my device in position on a hammer and additional means for facilitating the removal of the device from the hammer.

Other objects and advantages relate to the size, shape and relation of parts all as will more fully appear from the following description taken in connection with the accompanying drawings in which Figure 1 is a side elevation of a machinist hammer with the handle partially broken away and showing, in section, my device in position on the hammer.

Figure 2 is a perspective view of my device.

It will be understood that the exact shape of the rear end or peening end of the hammer may be varied and that the interior of my device may be changed to accommodate dif ferent sizes of hammers but for the purpose 1928. Serial No. 270,540. I

ofdescribing my device and its operation I I have here illustrated a hammer head 1 having a rear end 2 formed with a shoulder 3 adjacent its rear end and having the usual handle 4. V My'auxiliary device 5 is cylindrical in shape with the rear For the purpose of retaining my device in position I provide in the inner surface of aperture 9- an inwardly extending spring 12 held in postion by a screw 13 and adapted to bear against shoulder 3 to releasably hold my device 5 in position on shank 10. Spring 12 has its inner end 14 bent outwardly so that it will conform to shoulder 3. A hole 15 leading outwardly from aperture -9 is provided for the reception of end -14 of spring 10 when the same is depressed to permit the removal of my device 5 from shank 10.

On the surface of portion 7 I provide an angular lug -16 having its front face 17 flush with the front edge 18 of my device. Lug 17 slopes downwardly and rearwardly and merges into portion My device is designed not only to add weight to the hammer head when it is in position but also to provide an auxiliary striking surface forthe hammer of a material softer, and a material of which the hammer head itself is made. I, therefore, contemplate using brass or lead or other appropriate material in constructing my device depending upon the degree of softness which is preferably for the use to which it is to be put.

The lug 16 above mentioned is provided so that a place will be provided which may be struck by a hammer or other implement for the purpose of assisting in the removal of the device if the same should be too tightly in position for removal by hand.

It will also be understood that the size of my device may be changed as desired as may its particular shape.

I Although I have shown and described a specific structure and form of my device as an exemplification of an embodiment of. my invention I do not desire to restrict myself to the exact shape or form as various changes may be made Within the scope of the appended claim.

What I claim is:

In a device of the class described, a main body having a recess in one end adapted to receive the peen of a hammer, a spring positioned in the recess adapted to engage the peen to releasably hold the body in position, anda lug extending laterally from the body, said lug being of a height to extend outward- 1y beyond the body of the hammer to provide a striking surface.

- In witness whereof I have hereunto set my hand this 31 day of March, 1928'.

CHARLES D. CUMMINGS. 

